To prevent the Grijalva river from overflowing, during the construction of the Chicoasén dam, "el ratón" and some engineers die. Two archaeologists decipher antique signs on the walls of the Canyon and discover the source of danger.
1944
1978
1941
1972
1988
2013
1998
2004
2015
1947
1992
2011
1935
1938
1994
1985
1966
1995